206 MILLER 



and head. Sides, flanks, cheeks and outer surface of legs clear tawny- 

 ochraceous. Underparts soiled yellowish white to base of hairs. 

 The white extends down inner side of front legs to wrists, but on hind 

 legs, as in Miis szirrfer, it is usually interrupted between knee and 

 heel. Feet dull white. Ears and dorsal surface of tail to terminal 

 third or fourth dark brown. Underside of tail and whole of terminal 

 third or fourth dull white. Underfur of back light slate color. 



Skull and teeth as in Mus surifer. 



Measureme7its. — Three adults measure as follows : No. 101737, 

 9 , Pulo Jimaja (type); total length 330; head and body 178; tail 

 vertebrcB 152; hind foot 40 (39); ear from meatus 21; ear from 

 crown 17; width of ear 16. No. 101738, ^, Pulo Jimaja; total 

 length 330; head and body 1.78; tail vertebrae 152; hind foot 40 (39). 

 No. 101701, 9 , Pulo Siantan; total length 343; head and body 184; 

 tail vertebrcB 159; hind foot 41 (39). 



Specime7is exa?nifzed. — Five, all from the Anambas; two taken on 

 Pulo Jimaja and three on Pulo Siantan. 



Remarks. — Though closely related to Afus surifer this species is 

 readily distinguishable by its much shorter tail. 



MUS LINGENSIS sp. nov. 



Type. — Adult male (skin and skull). No. 101614 United States 

 National Museum. From Linga Island. Collected July 15, 1899. 



Characters. — Closely related to Mus surifer and M. pcllax ; size 

 and cranial characters as in the former, color more nearly like that of 

 latter. White of inner side of hind leg broadly continuous with that 

 of dorsal surface of foot. Bony palate narrower than in the allied 

 species. 



Color. — Dorsal surface an indescribable grizzle of dark hair-brown, 

 clay color, and drab, darkest on middle of back, lightest and most 

 tinged with yellow on neck. Sides drab, slightly varied with hair- 

 brown and clay color. Ventral surface of body and inner side of legs 

 white tinged with cream color. The white of the hind leg is broadly 

 continuous with that of dorsal surface of foot. A distinct blackish 

 eye ring. Tail bicolor, whitish below and at tip, elsewhere dark brown. 



Ski4ll and teeth. — The skull closely resembles that of ]\/7(s surifer 

 except in the form of the bony palate. This is more elongate than in 

 either of the related mainland species or in ]\f. ana??ib(€. The ratio 

 of width of palate between anterior molars to distance between pos- 

 terior border of incisive foramen and anterior border of interpterygoid' 

 space is 42 and 43 respectively in two specimens of Mus lingensisy 



